S-90276A592 5/16"-18 x 2 1/4" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• High-load bearing capacity with 60,000 psi tensile strength and Rockwell B69 hardness for reliable performance under stress
• Optimized thread engagement through Class 2A fit UNC coarse threads ensuring vibration-resistant fastening
• Easy installation and removal with standard slotted drive design compatible with common hand tools
• Controlled thread application through partial threading design preventing over-tightening in precision assemblies
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and international environmental standards
• Versatile rounded head profile providing smooth surface finish while maintaining structural integrity

Professional Applications & Engineering Value

This zinc-plated steel rounded head screw delivers exceptional engineering value for industrial fastening applications where corrosion resistance and structural reliability are paramount. The 5/16"-18 UNC coarse thread configuration with Class 2A fit provides optimal engagement in various materials while the partial threading design allows for precise clamping force control. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures these screws withstand vibrational stresses in machinery, automotive components, and structural assemblies. The slotted drive system maintains compatibility with standard installation tools, while the rounded head profile offers both aesthetic appeal and safety in exposed applications.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread specifications. Complies with ASME B18.6.3 mechanical and dimensional requirements. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. The inch system measurements ensure compatibility with North American industrial specifications and replacement part requirements.